Plan the perfect garden with our interactive tool →

The Size of Martin Birdhouse Holes

...
Arthur Tilley/Creatas/Getty Images

A beloved favorite of home and property owners, purple martins feed enormously on irritating mosquitoes. A group of martins living on your property can transform your backyard into a comfortable, itch-free oasis. However, to attract and keep martins on your property, you must ensure you create comfortable quarters for martins. This includes providing the martin with an ideally sized home entrance hole.

Diameter

Professionals offer varying opinions on the proper size hole to provide for martin birdhouses. Professionals at Wild-Bird-Watching.com recommend a hole diameter between 1 3/4 inches and 2 1/4 inches, while professionals at AttractWildBirds.com recommend holes sized at exactly 2 1/4 inches.

Specifications

Professionals at AmishGourds.com recommend a special crescent shape for purple martin houses, whether made from gourds or wooden boxes. Amish Gourds recommends a “D” shaped entrance hole with the flat end along the bottom, measuring 3 inches long with the top of the curve a total distance of 1 1/2 inches from the bottom of the opening.

Purpose

Specially sized and shaped entrance holes for purple martins prevent enemy and predator birds from entering the martins' home. The crescent shaped holes recommended by Amish Gourds are meant to resist starling birds, a natural enemy of the martin.

Related Articles

Height of a Purple Martin Bird House
Height of a Purple Martin Bird House
How to Attract Birds to a Birdhouse
How to Attract Birds to a Birdhouse
How to Keep Crows Out of the Garbage Bags
How to Keep Crows Out of the Garbage Bags
How to Diagnose a Hole in the Lawn
How to Diagnose a Hole in the Lawn
What Types of Trees Have Purple Flowers?
What Types of Trees Have Purple Flowers?
Princess Kay Plum Tree Help
Princess Kay Plum Tree Help
Privacy Fence Laws in Florida
Privacy Fence Laws in Florida
A Job Description for a Landscape Operations Manager
A Job Description for a Landscape Operations Manager
How to Keep a Skunk & Possum Away From Your Barn
How to Keep a Skunk & Possum Away From Your Barn
How to Install a Craftsman Mower Deck
How to Install a Craftsman Mower Deck
Do it Yourself Sliding Gate Opener
Do it Yourself Sliding Gate Opener
How to Landscape a Bird Bath
How to Landscape a Bird Bath
How to Attract Doves to Your Yard
How to Attract Doves to Your Yard
Fruit Trees That Grow in Wisconsin
Fruit Trees That Grow in Wisconsin
Tools for Tree Core Sampling
Tools for Tree Core Sampling
How to Identify Types of Holly Bushes
How to Identify Types of Holly Bushes
How to Make a Bee Escape
How to Make a Bee Escape
Garden Guides
×